Transformers
Power Transformer
Facilitate efficient bulk power transmission with our high-performance Power Transformers. As critical components of large-scale power grids, these transformers are engineered for robust operation in generating stations, transmission substations, and industrial main power supply. Our Power Transformers are available in a vast range of MVA ratings and ultra-high voltage classes, typically using oil-filled designs for optimal cooling and dielectric strength. They ensure minimal energy loss, precise voltage regulation, and superior operational stability, crucial for national and international grid interconnections. Trust our compliant, durable, and custom-engineered solutions for your most demanding power infrastructure projects.
35kV 46kV Power Transformer
NPC ELECTRIC's 35kV and 46kV power(electrical) transformer complies with international standards such as IEC and ANSI, and features high efficiency, low loss, and strong insulation. This product is widely used in power grid main transformers, power plants, industrial and mining enterprises, and large infrastructure projects. It has a compact structure and reliable operation, and is suitable for all types of outdoor and indoor installation environments.
66kV 69kV Power Transformer
66 69kV power transformer uses high-performance silicon steel sheets and a fully sealed structure design, with excellent insulation performance and thermal stability. The product complies with international and national standards, such as 1 . IEC 60076 Power Transformers; 2. AS NZS 60076 Power Transformers CSAC88-16 Power Transformers 3.ANSI/IEEE C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers; 4. GOST R 52719 Power Transformers - General Specifications; 5. EN60076 Poer Transformer;8. Local After-Sales Services In North America South
110kV 115kV Power Transformer
NPC ELECTRIC's 110kV and 115kV power transformers are designed with advanced low-loss silicon steel sheets and efficient cooling systems, complying with international standards such as IEC 60076 and GB 1094, ensuring stable and reliable operation in high-voltage transmission systems. They are widely used in large power plants, substations, and industrial parks, providing safe and efficient power conversion and transmission solutions for power grids.
132kV 138kV Power Transformer
132kV 138kV power transformer complies with international standards as below standard: 1. IEC 60076 Power Transformers; 2. AS NZS 60076 Power Transformers CSAC88-16 Power Transformers; 3. ANSI/IEEE C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers; 4. GOST R 52719 Power Transformers - General Specifications; 5. EN60076 Poer Transformer; 6. Local After-Sales Services In North America South
220kV 230kV Power Transformer
NPC ELECTRIC's 220kV and 230kV power transformer complies with the International Electrotechnical Commission (IEC) standards as below: 1. IEC 60076 Power Transformers; 2. AS NZS 60076 Power Transformers CSAC88-16 Power Transformers; 3. ANSI/IEEE C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers; 4. GOST R 52719 Power Transformers - General Specifications; 5. EN60076 Poer Transformer; 6. Local After-Sales Services In North America South
6kV Three-Phase Oil-Immersed Power Transformer
The 6kV Three-Phase Oil-Immersed Power Transformer is designed for stable and efficient voltage conversion in industrial and commercial power distribution systems. With a durable oil-immersed insulation structure and high-quality copper windings, it offers excellent thermal performance, strong dielectric strength, and reliable operation under varying load conditions. Its compact design, robust core materials, and advanced cooling system ensure low losses, reduced noise, and long service life. This 6kV transformer is suitable for factories, mining sites, distribution stations, and utility networks requiring consistent and safe electrical power supply. Engineered to meet international standards, it provides dependable performance and high efficiency across diverse low-to-medium voltage applications.
20kV Three-Phase Oil-Immersed Power Transformer 50-2500kVA Copper
The 20kV Three-Phase Oil-Immersed Power Transformer 50-2500kVA Copper adopts high-purity electrolytic copper windings, Class A insulation, and advanced ONAN cooling design. Available in energy-saving S11/S13/S20 series with no-load loss reduced by up to 40%. Fully sealed corrugated tank or conservator type effectively prevents oil aging and moisture ingress. It complies with IEC 60076, GB/T 1094, and can be equipped with ±5% or ±2×2.5% off-circuit tap changer. Low noise (<55 dB), strong short-circuit withstand capability, and overload capacity make it ideal for industrial parks, commercial buildings, and renewable energy projects. Vacuum oil filling and nitrogen sealing ensure insulation performance for over 30 years. Factory supports full third-party inspection (SGS/BV) and provides type test reports.
11kV Three-Phase Oil-Immersed Power Transformer
The 11kV Three-Phase Oil-Immersed Power Transformer is engineered for stable and efficient distribution across medium-voltage networks. Designed with high-grade silicon steel, advanced insulation systems, and premium mineral oil, this transformer ensures superior dielectric strength, excellent heat dissipation, and long service life. Its oil-immersed configuration delivers reliable cooling performance, enabling continuous operation under varying load conditions. The three-phase design ensures balanced power delivery, reduced energy losses, and improved grid stability. With enhanced short-circuit strength, low noise levels, and robust mechanical structure, it is suitable for industrial facilities, commercial complexes, substations, and utility distribution networks. Custom voltage ratios, tap changers, protection devices, and enclosure options are available to meet regional standards and project-specific requirements.
33kV Three-Phase Oil-Immersed Step-Up Power Transformer
The 33kV Three-Phase Oil-Immersed Step-Up Power Transformer is engineered for reliable voltage elevation in medium- and high-voltage distribution networks. Designed with high-grade silicon-steel cores, copper windings, and an efficient oil-immersed cooling system, this transformer delivers stable power transmission with low losses and strong short-circuit endurance. Its robust insulation, sealed tank structure, and advanced protection devices ensure long-term performance in demanding industrial and substation environments. Widely used in renewable energy plants, utility networks, industrial facilities, and rural power upgrades, the 33kV step-up transformer provides secure, efficient, and continuous operation. It supports both on-load and off-load tap changers, offering precise voltage regulation and adaptability to varying grid conditions, making it a dependable choice for modern power distribution systems.In-Depth Analysis
Power transformers are built to deliver high efficiency, reliable performance, and advanced safety, helping businesses reduce energy costs while ensuring stable power supply. With future-ready adaptability for renewable energy and smart grid applications.
Comparative Analysis of Efficiency and Loss
Compared to the industry average, transformers exhibit lower losses and higher efficiency across the entire load range.
Load Efficiency Comparison(%)
No-load Loss Comparison(W)
High-efficiency Core Design
High magnetic permeability and low loss silicon steel sheets are used and processed by special process to reduce hysteresis loss and eddy current loss and improve conversion efficiency.
Improved Magnetic Permeability
+30%
Reduced Iron Loss
-35%
Multiple Protection Systems
IP65 protection grade design combines multiple protection measures such as anti-corrosion, anti-UV, anti-condensation and anti-small animal intrusion.
Waterproof Performance
IP65
Anti-Corrosion Ability
15 years+
Ultra-low Noise Technology
A special shock-absorbing structure, low-noise fans, and optimized heat dissipation design ensure operating noise is far below industry standards.
Noise Reduction
-15dB
Suitability for Residential Areas
Excellent
Intelligent Cooling System
The heat dissipation system with adaptive temperature control automatically adjusts the heat dissipation efficiency according to the load and ambient temperature to reduce energy consumption.
Heat Dissipation Efficiency
+40%
Temperature Stability
±2℃
Safety Wiring System
Insulated protective cover and anti-misoperation design ensure personnel safety during installation and maintenance and reduce accident risks
Insulation Grade
Class H
Safety Protection
IP2X
Intelligent Monitoring
An optional remote monitoring system is available to monitor operating status, temperature, load and other parameters in real time, and supports fault warning and remote diagnosis.
Data Collection Frequency
one times a minute
Fault Warning Accuracy
96%
Environmental Adaptability Analysis
Power transformers have been rigorously tested and can operate stably under various harsh environmental conditions.
Temperature Range
-40℃ ~ +55℃
Can work normally in extreme high and low temperature environments
Humidity Adaptation
0 ~ 100% RH
Including condensation environment, no frost requirement
Seismic Resistance Level
IEC 60068-2-57
Suitable for earthquake-prone areas
Altitude
≤3000m
More than special design
Why Choose Us
Discover why our power transformers are trusted worldwide for efficiency, safety, and reliability.
Power Transformers Manufacturer
NPC Electric is a trusted power transformer manufacturer dedicated to delivering reliable and efficient power solutions for utility, industrial, and renewable energy sectors. Our range of power transformers includes oil-immersed power transformers, dry type power transformers, and substation transformers, designed to handle high voltage transmission and large-capacity distribution.
Each unit is engineered for maximum efficiency, low losses, and long service life. As a leading transformer manufacturer, NPC Electric adheres to international standards such as IEC, IEEE, and ANSI, ensuring global compatibility and safety. With advanced production facilities, strict quality control, and custom design capabilities, we provide high-performance three-phase power transformers tailored to diverse grid and project requirements. Choose NPC Electric for dependable power transformation and sustainable energy solutions worldwide.
Unrivaled Reliability & Robust Durability
NPC Electric Power Transformers offer unrivaled reliability and boast a robust design, specifically built for continuous, heavy-duty operation within demanding high-voltage environments. Each transformer undergoes stringent quality control and testing, utilizing premium insulation materials, advanced cooling systems (e.g., ONAN, ONAF, OFAF), and durable construction techniques. This ensures exceptional mechanical strength and a high short-circuit withstand capability, minimizing the risk of failures and extending operational lifespan. By choosing our reliable power transformers, you secure the unwavering stability and uninterrupted power flow essential for the backbone of any modern electrical grid infrastructure.
Stable Voltage & Grid Performance
Our Power Transformers provide superior voltage regulation, crucial for maintaining grid stability and ensuring high-quality power delivery across vast distances. Equipped with advanced tap changers (both On-Load Tap Changer (OLTC) and Off-Circuit Tap Changer (OCTC) options), these transformers precisely adjust output voltage to compensate for load fluctuations and system imbalances. This capability minimizes voltage sags or swells, protecting sensitive equipment and ensuring consistent power quality for industrial, commercial, and residential consumers. By integrating our stable power transformers, you optimize the performance and responsiveness of your transmission and distribution networks, securing a robust foundation for modern power systems.
Custom Solutions for Diverse Needs
We specialise in providing custom-engineered solutions for Power Transformers, catering to the diverse and complex requirements of various high-voltage applications. Our expert team collaborates closely with clients to design transformers with specific ratings, impedance values, cooling configurations, and auxiliary equipment. Whether for new substation projects, grid expansion, or renewable energy integration, we deliver tailored designs that optimise performance, space utilisation, and cost-effectiveness. By choosing our custom power transformers, you gain a purpose-built solution that perfectly integrates into your unique electrical infrastructure, ensuring peak performance and future scalability for your critical power needs.
Product Show
Explore the detailed design and practical application scenarios of power transformers
220kV Electrical Transformer
220kV transformer product show
350kV Power Transformer
350kV transformer product completed
Step Up Power Transformer
step up transformer is a power transformer
Step Up Transformer Font
step up transformer font view
Power Transformer Oil Temperature
transformer oil temperature design
750kV Power Transformer
750kV transformer design struture
Power Transfomer Oil Conservator
transfomer oil conservator design
Power Transformer Produce Line
worker produce power transformer
Testing and Certification
Tested with precision and certified to meet international standards as
well as strict industry requirements.
Bare Cable Test Report
SGS Inspection Report
Certificate of Acceptance
ISO Quality Certificate
ISO Environmental Certificate
ISO Occupational Certificate
UL Laboratory Certificate
UL Product Certificate
Project Cases
Power transformers have been successfully applied in many projects and have been highly praised by customers.
Venezuela Residential Area
CompletedProvide stable and reliable power conversion solutions for the residential area to meet diverse production needs.
Country：Venezuela
Model：220kV Power Transformer x 5
Uruguay Data Center
CompletedEnsure the power safety of surrounding residents and meet daily work needs
Country：Uruguay
Model：350kV Power Transformer x 10
Dominican Factory
CompletedNPC transformers provide safe, efficient, and reliable power distribution in the Dominican.
Country：Dominican
Model：450kVA Power Transformer x 4
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
FAQ From Customers
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What is the power transformer?
A power transformer is a type of electrical transformer designed to transfer energy between different voltage levels in power generation and distribution systems. It operates at high efficiency, enabling stable voltage transmission across long distances. NPC Electric manufactures step up and step down power transformers to support power plants, substations, and industrial networks worldwide. -
Why do we use power transformers?
We use power transformers to adjust voltage levels for efficient power transmission and distribution. A step up transformer increases voltage for long-distance transmission, minimizing energy loss, while a step down transformer reduces voltage for safe end-user consumption. These electrical transformers are essential for maintaining grid stability and efficient energy flow. -
What is the difference between a step up and a step down transformer?
The main difference lies in voltage conversion. A step up transformer raises the voltage from a lower level to a higher level for transmission, while a step down transformer decreases voltage to supply local or residential loads. Both are key components in modern power transformer systems ensuring efficient and safe energy delivery. -
Where are power transformers used?
Power transformers are widely used in electrical substations, industrial plants, renewable energy systems, and transmission networks. Whether a step up transformer for a solar power station or a step down transformer for factory distribution, they play a crucial role in converting and controlling electrical energy efficiently. -
How do power transformers improve energy efficiency?
Power transformers improve energy efficiency by reducing voltage-related losses during transmission. Using step up and step down transformers, electrical utilities can deliver power over long distances with minimal waste. NPC Electric’s high-efficiency power transformers are engineered with low-loss cores, advanced insulation, and optimized cooling systems to ensure maximum performance. -
What are the main components of a power transformer?
The key components of a power transformer include the core, windings, insulation, cooling system, and protective enclosure. The core carries magnetic flux, while the primary and secondary windings handle voltage transformation. NPC Electric designs electrical transformers with high-grade silicon steel cores and advanced insulation to ensure high efficiency, reliability, and safety.
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